High-power-density BLDC (brushless direct current) driver discharge module mounting structure

Abstract

A high-power-density BLDC driver discharge module installation structure comprises a power board, a discharge circuit board, a positive bus copper bar, a negative bus copper bar and a separator plate. The invention not only can reduce the occupied space, but also can reduce the cost, and has good heat dissipation conditions. Product reliability and safety can be improved, and meanwhile product compactness is guaranteed. The power supply is connected into the discharge circuit board through the contact points, the distance is shortened, the response efficiency is improved, and the cost is saved. The whole structure layout is compact, the power density is improved, and the heat dissipation capability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of motor structure design, and in particular to a high power density BLDC driver discharge module installation structure. Background Art

[0002] Brushless Direct Current Motor (BLDC Motor) refers to a motor without brushes and commutator, which consists of a motor body and a driver. It has the characteristics of fast response, large starting torque, and the ability to provide rated torque from zero speed to rated speed. BLDC motor is a high-efficiency, high-precision, and high-reliability motor with broad application prospects.

[0003] At present, BLDC type motors are widely used in vehicles. The use of control electronic device switches to replace the traditional DC motor carbon brush commutator can not only increase the service life of the motor, but also realize the intelligence of equipment through communication technologies such as CAN. However, the high power density BLDC motor has a large current when starting and a large back electromotive force when stopping. If the power stored in the capacitor is not consumed quickly, it is very easy to cause damage to the drive.

[0004] In the prior art, the discharge module is independently installed outside the driver. However, installing it outside the driver not only increases the use cost but also reduces the response speed. Summary of the invention

[0005] The object of the present invention is to provide a high power density BLDC driver discharge module installation structure, comprising: a power board, a discharge circuit board, a positive bus copper bar, a negative bus copper bar, and a partition.

[0006] The power board is used to carry the positive busbar copper bar and the negative busbar copper bar.

[0007] When the BLDC driver stops, the discharge circuit board instantly consumes the stored electric energy of the capacitor in the BLDC driver.

[0008] The positive busbar copper bar and the negative busbar copper bar are mirror images of each other and both include a terminal board, a web plate and a mounting plate.

[0009] One side of the web is connected to the middle of the mounting plate, and the other side is connected to the end of the wiring board to form an "H"-shaped structure.

[0010] The wiring board is provided with a wiring hole for connecting the electric energy of the BLDC driver.

[0011] The mounting plate is provided with a support column for connecting the discharge circuit board, and the support column is arranged on a side of the web away from the wiring board.

[0012] The support column contacts the discharge circuit board to input the electric energy of the BLDC driver into the discharge circuit board.

[0013] The partition is used to install the main control board of the BLDC driver.

[0014] The partition is closely attached to the discharge circuit board.

[0015] Furthermore, the discharge circuit board includes a circuit board, two discharge resistor modules, and a MOSFET power module.

[0016] The circuit board is used to carry two discharge resistor modules and a MOSFET power module.

[0017] The discharge resistor module is used to consume the stored electric energy of the capacitor in the BLDC driver.

[0018] The MOSFET power module is used to conduct the capacitor and the discharge resistor module in the BLDC driver.

[0019] The two bleeder resistor modules and the MOSFET power module are packaged and mounted on one side of the circuit board.

[0020] The two bleeder resistor modules are mounted in parallel on the top of the circuit board, and the MOSFET power module is mounted on the bottom of the circuit board.

[0021] Furthermore, the discharge resistor module adopts TO-220 packaging.

[0022] Furthermore, the discharge resistor module adopts TO-247 packaging.

[0023] Furthermore, the MOSFET power module adopts TO-220 packaging.

[0024] Furthermore, the MOSFET power module adopts TO-247 packaging.

[0025] Furthermore, one side of the discharge circuit board carrying the discharge resistor module and the MOSFET power module is close to the partition.

[0026] Furthermore, the discharge circuit board also includes a comparator.

[0027] The comparator is used to determine whether the BLDC driver power supply voltage exceeds a threshold value, and if so, start the BLDC driver discharge module.

[0028] The comparator is mounted on the circuit board and is far away from the side where the discharge resistor module and the MOSFET power module are located.

[0029] Furthermore, the wiring holes of the positive busbar copper bar and the negative busbar copper bar are connected to the partition plate and connected to the main control board of the BLDC driver, thereby connecting the electric energy of the BLDC driver to the discharge circuit board.

[0030] The technical effect of the present invention is unquestionable. The present invention can not only reduce the occupied space, but also reduce the cost and have good heat dissipation conditions. The present invention can improve the reliability and safety of the product while ensuring the compactness of the product. The present invention uses the contact point to connect the power supply to the discharge circuit board, shorten the distance, speed up the response efficiency, and save costs. The overall structure of the present invention is compact, improves the power density, and has good heat dissipation capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the discharge circuit board; Figure 1 (a) is the rear view of the discharge circuit board structure; Figure 1 (b) is a side view of the discharge circuit board structure; Figure 1 (c) is a front view of the discharge circuit board structure;

[0032] Figure 2 Installation diagram for the bleeder circuit board;

[0033] Figure 3 This is a schematic diagram of the discharge module installation;

[0034] In the figure, there are a power board 101, a discharge circuit board 102, a discharge resistor module 1021, a MOSFET power module 1022, a positive busbar copper bar 103, a negative busbar copper bar 104, a partition 105, a terminal board 106, a web 107, and a mounting board 108. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0036] Embodiment 1:

[0037] See also Figures 1 to 3 A high power density BLDC driver discharge module installation structure includes: a power board 101, a discharge circuit board 102, a positive bus copper bar 103, a negative bus copper bar 104, and a partition 105.

[0038] The power board 101 is used to carry a positive busbar copper bar 103 and a negative busbar copper bar 104 .

[0039] When the BLDC driver stops, the discharge circuit board 102 instantly consumes the stored energy of the capacitor in the BLDC driver.

[0040] The positive busbar copper bar 103 and the negative busbar copper bar 104 are mirror images of each other and both include a terminal board 106 , a web 107 , and a mounting plate 108 .

[0041] One side of the web 107 is connected to the middle of the mounting plate 108 , and the other side is connected to the end of the wiring board 106 , forming an “h”-shaped structure.

[0042] The wiring board 106 is provided with wiring holes for connecting the electric energy of the BLDC driver.

[0043] The mounting plate 108 is provided with a support column for connecting to the discharge circuit board 102 , and the support column is arranged on a side of the web 107 away from the wiring board 106 .

[0044] The support column contacts the discharge circuit board 102 to input the electric energy of the BLDC driver into the discharge circuit board 102 .

[0045] The partition plate 105 is used to install the main control board of the BLDC driver.

[0046] The partition plate 105 is closely attached to the discharge circuit board 102 .

[0047] Embodiment 2:

[0048] A high power density BLDC driver discharge module installation structure, the main technical content is shown in Example 1, further, the discharge circuit board 102 includes a circuit board, two discharge resistor modules 1021, and a MOSFET power module 1022.

[0049] The circuit board is used to carry two discharge resistor modules 1021 and a MOSFET power module 1022 .

[0050] The discharge resistor module 1021 is used to consume the stored electric energy of the capacitor in the BLDC driver.

[0051] The MOSFET power module 1022 is used to conduct the capacitor and the discharge resistor module 1021 in the BLDC driver.

[0052] The two discharge resistor modules 1021 and the MOSFET power module 1022 are both packaged and mounted on one side of the circuit board.

[0053] The two discharge resistor modules 1021 are mounted in parallel on the top of the circuit board, and the MOSFET power module 1022 is mounted on the bottom of the circuit board.

[0054] Embodiment 3:

[0055] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 1 to 2, and further, the discharge resistor module 1021 adopts TO-220 packaging.

[0056] Embodiment 4:

[0057] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 1 to 3, and further, the discharge resistor module 1021 adopts TO-247 packaging.

[0058] Embodiment 5:

[0059] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of embodiments 1 to 4. Further, the MOSFET power module 1022 adopts TO-220 packaging.

[0060] Embodiment 6:

[0061] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of embodiments 1 to 5, and further, the MOSFET power module 1022 adopts TO-247 packaging.

[0062] Embodiment 7:

[0063] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of embodiments 1 to 6. Further, one side of the discharge circuit board 102 carrying the discharge resistor module 1021 and the MOSFET power module 1022 is close to the partition 105.

[0064] Embodiment 8:

[0065] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 1 to 7. Further, the discharge circuit board 102 also includes a comparator.

[0066] The comparator is used to determine whether the BLDC driver power supply voltage exceeds a threshold value, and if so, start the BLDC driver discharge module.

[0067] The comparator is mounted on a circuit board and is away from the side where the discharge resistor module 1021 and the MOSFET power module 1022 are located.

[0068] Embodiment 9:

[0069] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of embodiments 1 to 8. Furthermore, the wiring holes of the positive busbar copper bar 103 and the negative busbar copper bar 104 are connected to the partition 105 and connected to the main control board of the BLDC driver, thereby connecting the BLDC driver power to the discharge circuit board 102.

[0070] Embodiment 10:

[0071] See also Figures 1 to 3 A high power density BLDC driver discharge module installation structure includes: a power board 101, a discharge circuit board 102, a positive bus copper bar 103, a negative bus copper bar 104, and a partition 105.

[0072] The power board 101 is used to carry a positive busbar copper bar 103 and a negative busbar copper bar 104 .

[0073] When the BLDC driver stops, the discharge circuit board 102 instantly consumes the stored energy of the capacitor in the BLDC driver.

[0074] The positive busbar copper bar 103 and the negative busbar copper bar 104 are mirror images of each other and both include a terminal board 106 , a web 107 , and a mounting plate 108 .

[0075] One side of the web 107 is connected to the middle of the mounting plate 108 , and the other side is connected to the end of the wiring board 106 , forming an “h”-shaped structure.

[0076] The wiring board 106 is provided with wiring holes for connecting the electric energy of the BLDC driver.

[0077] The mounting plate 108 is provided with a support column for connecting to the discharge circuit board 102 , and the support column is arranged on a side of the web 107 away from the wiring board 106 .

[0078] The support column contacts the discharge circuit board 102 , and the electric energy of the BLDC driver is input into the discharge circuit board 102 , thereby shortening the distance, accelerating the response efficiency, and saving the cost.

[0079] The partition plate 105 is used to install the main control board of the BLDC driver.

[0080] The partition plate 105 is closely attached to the discharge circuit board 102 .

[0081] The mounting plates 108 of the positive busbar 103 and the negative busbar 104 are fixed side by side on the power board 101, and then the discharge circuit board 102 is installed on the supporting columns of the positive busbar 103 and the negative busbar 104, and the partition 105 is tightly attached to the discharge circuit board 102, thus completing the installation of the BLDC driver discharge module.

[0082] Embodiment 11:

[0083] A high power density BLDC driver discharge module installation structure, the main technical content is shown in Example 10, further, the discharge circuit board 102 includes a circuit board, two discharge resistor modules 1021, and a MOSFET power module 1022.

[0084] The circuit board is used to carry two discharge resistor modules 1021 and a MOSFET power module 1022 .

[0085] The discharge resistor module 1021 is used to consume the stored electric energy of the capacitor in the BLDC driver.

[0086] The MOSFET power module 1022 is used to conduct the capacitor and the discharge resistor module 1021 in the BLDC driver.

[0087] The two discharge resistor modules 1021 and the MOSFET power module 1022 are both packaged and mounted on one side of the circuit board.

[0088] The two discharge resistor modules 1021 are mounted in parallel on the top of the circuit board, and the MOSFET power module 1022 is mounted on the bottom of the circuit board.

[0089] Embodiment 12:

[0090] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 10 to 11, and further, the discharge resistor module 1021 adopts TO-220 packaging.

[0091] Embodiment 13:

[0092] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 10 to 12, and further, the discharge resistor module 1021 adopts TO-247 packaging.

[0093] Embodiment 14:

[0094] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 10 to 13. Furthermore, the MOSFET power module 1022 adopts TO-220 packaging.

[0095] Embodiment 15:

[0096] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 10 to 14. Further, the MOSFET power module 1022 adopts TO-247 packaging.

[0097] Embodiment 16:

[0098] A high power density BLDC driver discharge module installation structure, the main technical content is shown in any one of embodiments 10 to 15. Furthermore, one side of the discharge circuit board 102 equipped with the discharge resistor module 1021 and the MOSFET power module 1022 is close to the partition 105, the overall structure is compact, the power density is improved, and it has good heat dissipation capability.

[0099] Embodiment 17:

[0100] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Embodiments 10 to 16. Furthermore, the discharge circuit board 102 also includes a comparator.

[0101] The comparator is used to determine whether the BLDC driver power supply voltage exceeds a threshold value, and if so, start the BLDC driver discharge module.

[0102] The comparator is mounted on a circuit board and is away from the side where the discharge resistor module 1021 and the MOSFET power module 1022 are located.

[0103] Embodiment 18:

[0104] A high power density BLDC driver discharge module installation structure, the main technical content of which is shown in any one of Examples 10 to 17. Furthermore, the wiring holes of the positive busbar copper bar 103 and the negative busbar copper bar 104 are connected to the partition 105 and connected to the main control board of the BLDC driver, thereby connecting the BLDC driver power to the discharge circuit board 102.

[0105] Embodiment 19:

[0106] See also Figures 1 to 3 A high power density BLDC driver discharge module installation structure includes: a discharge circuit board and welded electronic components, a positive busbar copper bar, a negative busbar copper bar, a partition and a power board.

[0107] According to the attached drawings, the design method of the discharge module installation structure is described:

[0108] 1. The bleeder circuit board is mainly composed of bleeder resistors, MOSFET, power module, comparator, resistors and capacitors, etc. The bleeder resistors and MOSFET are packaged in TO-220 or TO-247.

[0109] 2. The positive and negative copper bars used to connect the power supply are designed with support columns for installing the discharge circuit board. At the same time, the contact points are used to connect the power supply to the discharge circuit board, shortening the distance, speeding up the response efficiency, and saving costs.

[0110] 3. The bleeder resistor and MOSFET heat dissipation surface in the bleeder circuit board are close to the bottom surface of the partition used to install the main control board. The overall structure is compact, the power density is improved, and it has good heat dissipation capability.

[0111] The discharge circuit board is installed directly on the busbar copper bar, and the power directly enters the circuit board through the contact point.

[0112] The resistors and MOSFET in the bleeder circuit board are closely attached to the bottom surface of the partition for mounting the main control board, and the overall structure is compact.

Claims

1. A high power density BLDC driver discharge module installation structure, characterized in that: include: A power board (101), a discharge circuit board (102), a positive busbar copper bar (103), a negative busbar copper bar (104), and a partition (105); The power board (101) is used to carry a positive busbar copper bar (103) and a negative busbar copper bar (104). When the BLDC driver stops, the discharge circuit board (102) instantly consumes the stored electric energy of the capacitor in the BLDC driver; The positive busbar copper bar (103) and the negative busbar copper bar (104) are mirror images of each other and both include a wiring board (106), a web (107), and a mounting plate (108); One side of the web (107) is connected to the middle of the mounting plate (108), and the other side is connected to the end of the wiring board (106), forming an "H"-shaped structure; The wiring board (106) is provided with a wiring hole for connecting the electric energy of the BLDC driver. The mounting plate (108) is provided with a support column for connecting to the discharge circuit board (102), and the support column is arranged on a side of the web (107) away from the wiring board (106); The support column contacts the discharge circuit board (102) to input the electric energy of the BLDC driver into the discharge circuit board (102); The partition (105) is used to install the main control board of the BLDC driver; The partition plate (105) is tightly attached to the discharge circuit board (102).

2. A high power density BLDC driver discharge module installation structure according to claim 1, characterized in that: The discharge circuit board (102) comprises a circuit board, two discharge resistance modules (1021), and a MOSFET power module (1022); The circuit board is used to carry two discharge resistor modules (1021) and a MOSFET power module (1022); The discharge resistance module (1021) is used to consume the stored electric energy of the capacitor in the BLDC driver; The MOSFET power module (1022) is used to conduct the capacitor and the discharge resistance module (1021) in the BLDC driver; The two discharge resistor modules (1021) and the MOSFET power module (1022) are both packaged and mounted on one side of the circuit board; The two discharge resistor modules (1021) are mounted in parallel on the top of the circuit board, and the MOSFET power module (1022) is mounted on the bottom of the circuit board.

3. A high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: The discharge resistance module (1021) adopts TO-220 packaging.

4. A high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: The discharge resistance module (1021) adopts TO-247 packaging.

5. The high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: The MOSFET power module (1022) adopts TO-220 packaging.

6. A high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: The MOSFET power module (1022) adopts TO-247 packaging.

7. A high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: One side of the discharge circuit board (102) carrying the discharge resistance module (1021) and the MOSFET power module (1022) is in close contact with the partition (105).

8. The high power density BLDC driver discharge module installation structure according to claim 2, characterized in that: The discharge circuit board (102) further includes a comparator; The comparator is used to determine whether the BLDC driver power supply voltage exceeds a threshold value, and if so, start the BLDC driver discharge module; The comparator is mounted on a circuit board and is far away from the side where the discharge resistor module (1021) and the MOSFET power module (1022) are located.

9. The high power density BLDC driver discharge module installation structure according to claim 1, characterized in that: The wiring holes of the positive busbar copper bar (103) and the negative busbar copper bar (104) are connected to the partition (105) and connected to the main control board of the BLDC driver, thereby connecting the electric energy of the BLDC driver to the discharge circuit board (102).

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